Manufacture of pasteboard cases and means therefor



. AND A. L. POMEON.

MANUFACTURE 0 TEBOARD CASES AND MEANS THEREFOR.

APPLICATION FILED mm. 4. ms.

1,388,888. Patented SHEE .Zhvenm Pier Pome'on 8708 6 Pom e'on,

fin Pamqn.

P., I. AND A. L. POMEON. MANUFACTURE OF PASTEBOARD CASES AND MEANS THEREFOR.

APPLICATION FILED MAR. 4, l9l9- Patented Aug. 1921 a SHEETS- n: T 2.

v f I M P., J. Am) A. 'L. POMEON. MANUFACTURE OF PASTEBOARD CASES AND MEANS THEREFOR.

APPUCATION FILED NHL 4. 1919.

Patented Aug. 30, 1921.

3 SHEETS-SHEET ,3.

Fig. 1!

Pierre Rm UNITED STATES PIERRE POMEON, JOSEPH POMEON, AND ANTOINE LEON POMEON, OF ST. GKAMOND,

PATENT OFFICE.

FRANCE.

MANUFACTURE OF PASTEBOARD CASES AND MEANS THEREFOR.

Application filed March 4,

To all whom it may concern:

Be it known that we, PIERRE POMFJON, J osnrn PomioN, and ANTOINE LEON PoMnoN, citizens of the French Republic, of St. Chamond, Loire, France, have invented certain new and useful Improvements in the Manufacture of Pasteboard Cases and Means Therefor, of which the following is a specification.

This invention mainly consists in a method and means for the utilization of sheet pasteboard instead of thin sheet metal for obtaining stamped cases, boxes and the like, comprising an annular flange or strengthening rib at the intersection of the bottom and the base of the cylinder. Further, the boxes may be of any suitable shape, and have one or more flanges or ribs.

The method consists in effecting the stamping of the case in such a manner that there may be a surplus either in the length 'of the cylinder of the case, or in the surface of the bottom, then in forcing the said surplus, while compressing it, into an annular neck of the mold, of which neckthis surplus material takes the shape and size.

The annexed drawings illustrate the invention.

Figures 1 to 3 illustrate in section a mold device in successive positions, Figs. 5 and 6 show a second device in successive positions:

Fig. 4 is an elevationview of the case so manufactured. Figs. 7 to 16 illustrate further modifications which will be described hereinafter.

The device shown in Figs. 1 to '3 enables the stamping of the case and the formation of the flange to be obtained in a single operation. It is composed:

1. Of'a mold Z) having at its center a cylindrical passage 0, both edges of which are splayed, and comprise each an annular groove; the upper groove has a determined diameter and height for receiving the pasteboard disk 1 to be stamped; the lower groove (Z is of dimensions corresponding to those of the flange to be obtained on the case.

2. Of a form-piece a in which is fitted the mold b and which is fastened on a stamping press of any known type.

3. Of the stamping-tool which comprises a cylinder 6, the tail-piece of which is fixed to the plunger of the press, and a piston it held in said cylinder by screws 7 screwed Specification of Letters Patent.

Patented Aug. 30, 1921.

surface of the said piston below the cylinder 6. I

'The said cylinder 6 has two external diameters. The greater diameter is the same as the inner diameter of the opening 0 of the mold, with a slight play, however, to allow the sliding of the said cylinder in this mold. The smaller diameter m is so measured that theannular space existing between its surface and that of the opening a may be equivalent to the thickness of the pasteboard disk r to be stamped.

The height of the projection made by the lower surface of the piston it below the edge of the cylinder 6 is also measured to corre spond with the excess height which the cylinder of the case r is to have during its stamping in order to allow the obtaining of the flange. The diameter of the pasteboard disk 0" is also determined from the amount of said excess.

The operation is as follows :The members being in the position of rest, Fig. 1, a pasteboard disk r is placed by hand above the mold in the groove destined to receive it: the press is then actuated to lower the plunger andits tool 6, h, which-enters into the opening cof the mold driving the pasteboard r which is stamped as represented by Fig. 2 where the case is shown partially formed without the flange. At that moment the height of the cylinder of the case equals the sum of the heights of the part m and of the projection of the piston hi i The cylinder 6 and the piston continuing their descending movement, the piston'stops when the bottom of the case r encounters the form-piece a, but the cylinder '6 still pursues its course andthe edge of its greater diameter presses on the edge of the pasteboard in order "to force back on itself the cylindrical part of'the latter. The result is that this longitudinal compression of the pasteboard compels the lower part of the cylinder of the case '1 to extend laterally and fit into the groove 05 of the mold, assuming the shape of this groove, as is well shown by Fig. 3.

The pasteboard case obtained by this stamping has now only the height of the part m of the cylinder 6 and the flange s has the same thickness as the pasteboard, but it could be of less or greater thickness; it would suffice to give the groove 65 a determined height. The projection of the said flange can also be varied by giving the.

groove (Z a suitable breadth. Fig. 4 shows in external view the case 1'- with its flange s as formed by the stamping operation which has just been described.

hen the cylinder 6 has effected its whole course, it has compressed the spring-rundles g and at the re-ascent of this cylinder, these springs push back the piston h and cause it to resume its normal position Fig. 1. The mold Z) is also arranged'so that it can be raised above the form-piece a after the ascent of the cylinder c. This elevation of the mold is necessary in order to be able to disengage and remove the manufactured case.

After the removal of the case, the mold descend-s again to resume its place in the form-piece a, the operator puts in place a fresh pasteboard disk and actuates the,

press. The same operations which have been described are recommenced.

The second method necessitates two successive operations. The first consists in stamping a pasteboard disk in order to obtain asingle case, the bottom of which, however, has a certain convexity, as shown by Fig. 5. Such a case r is then placed upside down in a mold 0. A cylindrical mandrel 7) is previously inserted in this case, the diameter of which is that of the case and the height equivalent to that of the cavity provided in the mold 0 from the bottom to the groove cl.

The excess paste'board is now in the bottomt of the case which forms a dome over th mandrel a and the mold. To the plunof the press is fixed circular plate a which descends on the mold and flattens the dome t of the case against the upper surface of the mandrel. The prcssure'exerted by this plate on the bottom of the said case spreads said bottom on the surface of the mandrel and forces the circumferential part to expand into the annular groove (Z ofthe mold and to form a flange 8, Fig.6, similar to that obtained by the first device.

In this latter device the mold; is fixed, as the manufactured case can easily be removed when the plate a is raised again. i

In the drawinga case of small height has been represented, but themethod and the devices for executing it allow cases m be obtained of several centimeters in height and of any desired diameter, as well as flanges of variable project-ion and any section, according to the uses for which the cases are intended.

In the device, Figs. 7, S, and 9, employed I (Z, at a distance which varies with the height of the box to be manufactured.

The stamping toel is similar to that hereinbefore described, and the stamping operation is the same, the cardboard disk r is still placed above the mold in the groove Z, then the tool is moved down. The length of the piston It is such that the cylinder 6 does not reach the bottom of its course when the base of the piston 7t flattens the disk 9" against the plate a, as shown in F 8. In this position of the tool, the cylindrical part of the case 9 has already been compressed by the cylinder 6 and the angle of the casebegins to be forced into the groove d.

The tool continuing its descendent course.

the compression of the cylindrical part. of

the case also continues until the base of the cylinder e reaches the disk 2", the final position of the stroke being shown in Fig. 9. During this final compression, the cardboar l is completely forced into the groove (Z and simultaneously into the intermediate groove (Z j i The case thus stamped consequently pos- 'sesses two flanges, one s, at the intersection of'the bottom and sides of the box, the other 3, extending outside these sides between. the flange s and theedge of the box.

F 10 represents box of rectangular shapeand lid of likeshape, which has only one flange The intermediate flange 8, serves as abutment to the lid..

It is understood that the boxes or cases obtained by the process can be of all desired sh apes. It suiiices to give required shapes to the hollow interior 0 of the mold and. to cut out the sheet of cardboard to be stamped. in the selected sizes and shapes.

Two or three intermediateflanges would be obtained if necessar 1 b r the same means as that above described for the flange 6,-

It is necessary that the mold should be constructed in'two or more jointed parts and capable of opening, in order to allow the removal of the 'case'or of the box having one or more intermediate flanges. By way of example, Figs. 13 to 16 show a mold in two parts A A jointed Q and, each having a pin G engaged in an oblique slide B, pro

vided in. a vertical plate C moving from the bottom upward. OI X lCB versa' forgthe j opening or closing of the mold. The latter is placedon. a block not illustrated fill-l filling the same function as the plate at hereinbefore described; the plate C slides in appropriate guides and is driven by any mechanism (cam, lever, etc.), actuated by means the pins G and the closing of the mold A A, the position in Figs. 13 and 14 corresponding to the stamping stage. "The ascending movement of said plate, on the contrary, determines the separation of the pins and the opening of the two parts A Aposition in Figs. 15 and'16 corresponding to the stage of removal of the box or of the stamped case.

The stamping apparatus for the cases with one or more flanges can be arranged for the automatic ejection of the manufac tured case, as shown by the example in Figs. 11 and 12. 7

I The mold 6 arranged for a single flange is mounted on the table D, so as to leave between it and the upper surface of said table a recess serving as a slide to a movable drawer T in which is provided an opening E of which the shape and size correspond to those of the case or stamped box R. The table D has an opening H similar to opening E and which is underneath and in the axis of that of the mold. The drawer is worked, for instance, by, means of a finger F, Fig. 12, which receives a reciprocating movement from any mechanical device driven by a pedal actuated by the operator.

For the stamping operation, the drawer T must be in the position of Fig. 11, where its solid hinder part is arranged below the cavity of the mold and forms the bottom thereof. When the stamping is finished the operator actuates the pedal to make the drawer return into its slide to the position of Fig. 12, where its opening E coincides with that of the mold and that, H, of the table. At that moment the operator actuates the hand-wheel in the desired direction in order to cause a fresh descent of the stamping tool, which has the efiect of pushing from the top downward the manufactured case and obliging it to detach itself from the tool when it arrives outside the mold. Fig. 12 shows the tool and the case halfway in the process of ejection. In order to facilitate the removal of the case, two or three claws can be placed around the wall of the opening E, said claws formed of a spring arranged so as to prevent the case from reascending with the tool and insure its rejection. The case will fall into a basket or any receptacle placed underneath the machine.

In-the case of boxes with several flanges, the drawer will return into position after the raising of the plate 0, and consequently when the two parts of the mold are separated from each other. The box will detach itself inmost cases, but its removal can be in sured by lowering the tool to a slight extent.

The devices just described can be advisably combined with a hand press or mechanically driven stamping presses inorder to produce a rapid manufacture of any stamped boxes or cases in strictly exact dimensions.

SlVhat we claim as our invention and desire to secure by Letters Patent of the United States is 1. In an apparatus for the purpose described, the combination of a mold having an annular groove in its inner face, a: mandrel or plunger comprising a tubular member, adapted to enter the mouth of the mold, a piston like member adjustably connected with the tubular member and arranged to extend through the end thereof that cooperates with the mold, and means acting to maintain the piston in projected relation to the tubular member and to permit the piston to be forced into said tubular member during the pressing operation, for the purpose specified.

2. In an apparatus for the purpose described, the combination of a mold having an annular groove in its inner face, a mandrel or plunger comprising a tubular member, adapted to enter the mouth of the mold, the end portion of the section of said member that enters the mold being of less area than the body of said section, a piston like member adjustably connected with the tubular member and arranged to move through the end of the tubular member within the mold, and yielding means within the tubular member acting to project the piston beyond the end of the tubular member, for the purpose specified.

3. In an apparatus for the purpose described, the combination of a. mold having, an annular groove in its inner face, a man- 'drel or plunger comprising a tubular member, adapted to enter the mouth of the mold, and provided with an annular exterior shoulder on that portion that enters the mold, a piston adapted to move through the end of the tubular-member within the mold, spring means acting to cause the piston to project from the tubular member, and means for limiting movement of the piston by said spring means.

4:. An apparatus for the purpose described, comprising a mandrel composed of a hollow cylinder, a solid piston within and having one end adapted to project beyond the edge of the hollow portion of the cylinder, springs mounted inside the cylinder and bearing on the piston, fixed abutments limiting the projection of said piston, the diameter of the base of the cylinder being externally decreased in order to form an an- I nular groove of height equal to that of the walls of the finished article, and of a depth corresponding to the thickness of the sheet of cardboard, the said mold having a groove at the base 01 its inner wall for receiving the excess cardboard which is forced in, by means of the shoulder of the annular groove at the descent of the mandrel.

5. In an apparatus for the purpose described, the combination of a mold having an annular groove at the base end of its inner surface and a second similar groove above said base end, a plunger comprising a tubular member having an exterior shoulder about the portion that is adapted to enter the mold and a piston movable through the end of the tubular member within the mold, and yielding means interposed between the piston and the tubular member and acting to normally cause the piston to project beyond the end of the tubular member, for the purpose described.

6. In an apparatusfor the purpose described, the combination of a mold having an annular groove at the base end of its inner surface and a seat for a blank at' its open end, a plunger movable into the mold and provided with an exterior annular shoulder and with a telescoping piston, of less area than the plunger body below said shoulder, and spring means within the plunger acting to normally project the piston therefrom.

In witness whereof we have signed this specification in the presence of two witnesses.

PIERRE PoMnoN. JOSEPH POMEON. ANTOINE LEON POMEON.

Witnesses CIvEnD,

Phones.

[n s.] [1,. s]- 

